Lem, S. (1967). Der Unbesiegbare. Buchclub 65.
Chicago Style (17th ed.) CitationLem, Stanislaw. Der Unbesiegbare. Berlin: Buchclub 65, 1967.
MLA (8th ed.) CitationLem, Stanislaw. Der Unbesiegbare. Buchclub 65, 1967.
Warning: These citations may not always be 100% accurate.